Physical Testing BK Drying Time Recorders - Sheen Drying Time Recorder The BK3 Drying Time Recorder...

Physical Testing BK Drying Time Recorders

Sheen [email protected] www.sheeninstruments.com

29 Central Avenue West Molesey Surrey. KT8 2RF

Tel: +44 (0)1803 407700

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BK3 Drying Time Recorder The BK3 Drying Time Recorder has been used widely in the coatings industry throughout the world for several decades. A needle carrier holding six hemispherical ended needles travels the length of the six 305 x 25 mm test strips in 6, 12 or 24 hours. Other speeds are available to special order. A time scale on the side cover is graduated to suit the three different travel times.

BK6 and BK10 Drying Recorders The BK6 and BK10 Recorders have independently operating tracks allowing tests to be made at different start times. Pairs of tracks operate at the same speed, and a wide range of travel times are available. The standard models are supplied with all tracks traversing at 12 hours, however, alternative combinations of speeds of 6, 12, 24 and 48 hours can be specified at the time of ordering. A time scale on the front cover is graduated to suit the instrument’s drying time ranges. Each pair of tracks has its own individual operating switch.

BK6 BK10

Physical Testing: BK Drying Time Recorders



Tel: +44 (0)1803 407700

Drying Stages Initially the needle passes through the film followed by defined stages in the drying process that can be identified as:

1. The needle passes through the film, it recovers to leave no trace, progressing to a pear shape impression, corresponding with the evaporation of the solvent.

2. Cutting of a continuous track corresponding to a sol-gel transition. 3. The track depth is reducing and becomes interrupted corresponding to a tack-free surface-dry time. 4. The needle no longer penetrates the film, corresponding to the final drying time.

Brass weights (supplied as an accessory), each weighing 5 grams, may be used to apply greater pressure on the needles and thus record the through-drying properties of alkyds, varnishes and paints. The BK Drying Recorders will give useful information about the gelation times of many two component surface coating materials, and the properties of such films.

Product specifications Description

Length of needle travel: 300mm Motor speeds: See the Featurea and Options table below Dimensions (cm):

BK3 BK6

BK10

47 x 22 x 12 46 x 35 x 15 46 x 53 x 15

Weight (kg): BK3 BK6

BK10

3.4 7.1 11.4

Electrical supply: 220 – 240V 50Hz 0,1 amp or 100 -115V 60Hz 0,1 amp

Standards: ASTM D5895/A




Tel: +44 (0)1803 407700

Drying Time Recorder Features and Options Model Tracks Motors Standard Speeds

(Hours) Motor Speed Options (Hours)

BK3 BK3/110V BK3/SV

220-240 – 50Hz 110-120V – 60Hz Motor speed option (state voltage)

6

1

6, 12, & 24 3, 6 & 12

12, 24, 48

1⁄2, 1, 2

1, 2, 4

2, 4, 8

24, 48, 96

BK6 BK6/110V BK6/SV

220-240 – 50Hz 110-120V – 60Hz Motor speed option (state voltage)

6 3 12 (Operates in 3 pairs) In pairs of 6, 24, 48

Special version in pairs, 1⁄2 to 96.

BK10 BK10/110V BK10/SV

220-240 – 50Hz 110-120V – 60Hz Motor speed option (stage voltage)

10 5 12 (Operates in 5 pairs) In pairs of 6, 24, 48

Special version in pairs, 1⁄2 to 96

Optional Accessories

SH1103 – Cube Film Applicator This small Applicator is available with 16 film width. (Applicator width 25mm). The standard applicator has a gap depth of 37µ at one end and 75µ at the other. It has one chamber 16mm diameter to contain the liquid sample. The applicator is placed at one end of the glass strip with the ground gap facing the end. Paint is poured into the hole and the applicator steadily drawn down the glass strip and off the other end, the gap being the trailing end of the applicator. Paint will flow through the gap depositing a 16mm wide film on the glass strip. Other gap depths between 10µ and 650µ can be supplied to suit customer requirements (SH1103A).

SHBK/CG – Casterguide A device for simplifying and “tidying-up” the process of applying the paint film to the glass strip. It consists of a cast aluminium trough with a ledge on each side to carry the glass strip and a step one end to allow the user to hold the strip in place. The applicator is then positioned on the glass strip at the step end and filled with paint as described above. When using the applicator the Casterguide ensures that the film is applied centrally and, as the applicator is drawn off the end of the glass strip, the surplus paint is collected in the trough underneath.




Tel: +44 (0)1803 407700

This operation may be repeated several times before cleaning is necessary. For this purpose use only suitable solvents, do not use caustic alkali or caustic detergents since these will attack the aluminium metal.

Ordering Information Product ref Description

SHBK3 Drying Time Recorder SHBK6 Drying Time Recorder SHBK10 Drying Time Recorder SHBK3/SV Drying Time Recorder, Motor speed option (state voltage) SHBK6/SV Drying Time Recorder, Motor speed option (state voltage) SHBK10/SV Drying Time Recorder, Motor speed option (state voltage)

Accessories and consumables SH1103 25mm Cube Film Applicator, 37/75µ gap sizes SH1103A 25mm Cube Film Applicator, other gap sizes on request

SHBK/CG Casterguide

SHBK/BW 5 Gram Brass Weights (pack of 6) SHBK/GLASS Glass Strips (pack of 12)

BKN/SS Needles (Stainless steel) (pack of 12)

BKN/T Needles (Teflon Coated) (pack of 6)

Owing to continuous development, we reserve the right to introduce improvements and modify specifications without prior notice.

Standard supply includes:

• Drying Time Recorder • Glass Panels (6 or 10 dependent on model) • Needles (6 or 10 dependent on model) • Instructions

Physical Testing BK Drying Time Recorders - Sheen Drying Time Recorder The BK3 Drying Time Recorder...

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